What is genetic variability?
Genetic variability refers to the potential for a given characteristic or genotype that turns into a population when they face a certain influence. Both the genetic variability of the population increases, as well as its resistance to environmental and genetic influences and eventually extinction. As a result, genetic variability is directly bound to biodiversity and development.
In terms of evolutionary biology, if the population lacks sufficient genetic variability, it also lacks the potential to evolve and adapt. Biodiversity is like a fuse because it acts as a bumper to minimize damage to the disaster that could otherwise erase the entire population. Regarding genetics, variability between the genotypes of the population can explain why different people have different reactions to different treatment, infections and medicines.
Climate change, disease and natural disasters have the potential to influence genetic variability and drive development. Without pregnancy, the population loses its potential to withstand these effects. BioloThe gick system, which has hereditary genetic variability and is vulnerable to natural selection, is considered to be evolvaral. In other words, in order for the population to evolve, it must have the ability to do so by a natural selection.
Increased variability also increases fitness. This is a concept that is supported by natural selection. Evolutionary adaptations in nature are the result of genetic variability of species paired with environmental and genetic influences.
Evolutionary adaptations actually observed in nature are described in terms of variation rather than variability. These two terms are often confused in scientific literature despite the subtle differences between the two terms. For the GEN, variations describe observable differences and variability is limited to potential for differences between individuals in the population.
The primary genetic cause of variability is pure randomnessIdie in sexual organisms. The frequency and location in which it is recombricated is quite accidental, so it follows that increased recombrors lead to increased variability and fitness. Polyploidy occurs when there are more homologous chromosomes, increasing the recomposal in offspring.
In asexual organisms, the sources of variability are limited because the genetic code is the same for parents and descendants. A similar limitation occurs when inbreeding is allowed, because genetic material from parents is less variable. Lack of variability in the population can lead to genetic problems such as mutation and drift.
Other causes of genetic variability are related to the environment. Environmental factors such as loss of habitat and climaton change create circumstances that individuals leave isolated from the population. If a new individual joins the population, the potential for change will increase.